Issue 6, 2022

Size determination of nanoparticles by ICP-ToF-MS using isotope dilution in microdroplets

Abstract

Within this work, the combination of a microdroplet generator and an ICP-ToF-MS for nanoparticle analysis is presented. For the size determination of platinum nanoparticles an on-line isotope dilution analysis approach was developed. The 194Pt/195Pt isotopic ratio was used for the characterization of the particles, while the 182W/183W isotopic ratio was monitored simultaneously for mass bias correction. The on-line ID-MDG-sp-ICP-ToF-MS approach was deployed for the size determination of three platinum nanoparticle samples (50 nm, 63 nm, 70 nm); for validation, complementary size characterization techniques (sp-ICP-ToF-MS and TEM) were used. The robustness of this technique was evidenced, by using sodium chloride concentrations up to 100 mg L−1 as a matrix component. Our new on-line ID MDG-sp-ICP-ToF-MS approach is a promising tool for the fast and reliable determination of nanoparticles' size in severe matrix concentrations, e.g., environmental samples.

Graphical abstract: Size determination of nanoparticles by ICP-ToF-MS using isotope dilution in microdroplets

Article information

Article type
Paper
Submitted
28 Febr. 2022
Accepted
09 Maijs 2022
First published
09 Maijs 2022
This article is Open Access
Creative Commons BY license

J. Anal. At. Spectrom., 2022,37, 1203-1207

Size determination of nanoparticles by ICP-ToF-MS using isotope dilution in microdroplets

M. V. D. Au, S. Faßbender, M. I. Chronakis, J. Vogl and B. Meermann, J. Anal. At. Spectrom., 2022, 37, 1203 DOI: 10.1039/D2JA00072E

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